I'm thinking lately, Richie is more famous and known it is true, but Joanie and Chachi for adolescents are more real.

in effect, Richie is always a good boy, for good, the coconut's mother.
if sometimes make something bad is quite rare

while Joanie and Chachi are more real adolescents, are often rebels Joanie often is in conflict with their parents (absolutely normal thing to that age)

in addition I think that Joanie and Chachi are somehow better than Richie, are more impulsive.

I really like Richie only in the early seasons, as early as the 6th I liked so much.

I do agree that the lifestyle of Joanie at her age/that age is more realistic then Richie. However, Richie made a lot of his short lived mistakes when with the guys, whether that be Fonzie, or Ralph & Potsie, or just looking for girls with guy friends. I think that element of his life is true, and I can confirm it, having gone through the adolescent and teenage years as a adolescent boy/man within the last few years. I think Joanie was more realistic a little bit, at that age but you also have to add in and think up different elements to what make up a child's realistic ways, or how individuals are portrayed in general, or during a certain age group.